use (new) safer GetTraitsIfExists() in wxMutexGuiEnter/Leave() to avoid crashing...

[wxWidgets.git] / src / msw / listbox.cpp

diff --git a/src/msw/listbox.cpp b/src/msw/listbox.cpp
index fd421c8467734f234e5e7e3d2f398b5603d2b68d..9252783bed0406b208a24047ddfa1aea529f7294 100644 (file)
--- a/src/msw/listbox.cpp
+++ b/src/msw/listbox.cpp
@@ -32,6 +32,7 @@
 #endif
 
 #include "wx/msw/private.h"
+#include "wx/msw/dc.h"
 
 #include <windowsx.h>
 
@@ -144,7 +145,7 @@ wxOwnerDrawn *wxListBox::CreateLboxItem(size_t WXUNUSED(n))
 wxListBox::wxListBox()
 {
     m_noItems = 0;
-    m_selected = 0;
+    m_updateHorizontalExtent = false;
 }
 
 bool wxListBox::Create(wxWindow *parent,
@@ -157,7 +158,7 @@ bool wxListBox::Create(wxWindow *parent,
                        const wxString& name)
 {
     m_noItems = 0;
-    m_selected = 0;
+    m_updateHorizontalExtent = false;
 
     // initialize base class fields
     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
@@ -198,7 +199,7 @@ bool wxListBox::Create(wxWindow *parent,
 
 wxListBox::~wxListBox()
 {
-    Free();
+    Clear();
 }
 
 WXDWORD wxListBox::MSWGetStyle(long style, WXDWORD *exstyle) const
@@ -244,6 +245,17 @@ WXDWORD wxListBox::MSWGetStyle(long style, WXDWORD *exstyle) const
     return msStyle;
 }
 
+void wxListBox::OnInternalIdle()
+{
+    wxWindow::OnInternalIdle();
+    
+    if (m_updateHorizontalExtent)
+    {
+        SetHorizontalExtent(wxEmptyString);
+        m_updateHorizontalExtent = false;
+    }
+}
+
 // ----------------------------------------------------------------------------
 // implementation of wxListBoxBase methods
 // ----------------------------------------------------------------------------
@@ -264,7 +276,10 @@ void wxListBox::DoDeleteOneItem(unsigned int n)
     SendMessage(GetHwnd(), LB_DELETESTRING, n, 0);
     m_noItems--;
 
-    SetHorizontalExtent(wxEmptyString);
+    // SetHorizontalExtent(wxEmptyString); can be slow
+    m_updateHorizontalExtent = true;
+
+    UpdateOldSelections();
 }
 
 int wxListBox::FindString(const wxString& s, bool bCase) const
@@ -287,7 +302,9 @@ void wxListBox::DoClear()
     ListBox_ResetContent(GetHwnd());
 
     m_noItems = 0;
-    SetHorizontalExtent();
+    m_updateHorizontalExtent = true;
+
+    UpdateOldSelections();
 }
 
 void wxListBox::Free()
@@ -313,6 +330,8 @@ void wxListBox::DoSetSelection(int N, bool select)
     {
         SendMessage(GetHwnd(), LB_SETCURSEL, select ? N : -1, 0);
     }
+
+    UpdateOldSelections();
 }
 
 bool wxListBox::IsSelected(int N) const
@@ -461,7 +480,9 @@ int wxListBox::DoInsertItems(const wxArrayStringsAdapter & items,
         AssignNewItemClientData(n, clientData, i, type);
     }
 
-    SetHorizontalExtent();
+    m_updateHorizontalExtent = true;
+
+    UpdateOldSelections();
 
     return n;
 }
@@ -521,7 +542,7 @@ void wxListBox::SetString(unsigned int n, const wxString& s)
     if ( wasSelected )
         Select(n);
 
-    SetHorizontalExtent();
+    m_updateHorizontalExtent = true;
 }
 
 unsigned int wxListBox::GetCount() const
@@ -625,6 +646,12 @@ wxSize wxListBox::DoGetBestSize() const
 
 bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 {
+    if ((param == LBN_SELCHANGE) && HasMultipleSelection())
+    {
+        CalcAndSendEvent();
+        return true;
+    }
+
     wxEventType evtType;
     if ( param == LBN_SELCHANGE )
     {
@@ -653,7 +680,10 @@ bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
             event.SetClientData( GetClientData(n) );
 
         event.SetString(GetString(n));
-        event.SetExtraLong( HasMultipleSelection() ? IsSelected(n) : true );
+    }
+    else
+    {
+        return false;
     }
 
     event.SetInt(n);